Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: O que é Score, quando o oponente é Natalia Rizhonkova?
 ###Tabelas: CREATE TABLE fourth_round_proper (fourth_round_proper_id AUTO_INCREMENT PRIMARY KEY, Tie no VARCHAR, Home team VARCHAR, Score VARCHAR, Away team VARCHAR, Date VARCHAR) CREATE TABLE world_records (world_records_id AUTO_INCREMENT PRIMARY KEY, Distance VARCHAR, Event VARCHAR, Time VARCHAR, Meet VARCHAR, Location VARCHAR) CREATE TABLE composition_of_the_17th_seanad (composition_of_the_17th_seanad_id AUTO_INCREMENT PRIMARY KEY, Administrative Panel INT, Agricultural Panel INT, Cultural and Educational Panel INT, Industrial and Commercial Panel INT, Labour Panel INT, National University of Ireland INT, University of Dublin INT, Nominated by the Taoiseach INT, Total INT) CREATE TABLE itf_singles_finals_18_12-6 (itf_singles_finals_18_12-6_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Championship VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE current_teams (current_teams_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, City/Area VARCHAR, Arena VARCHAR, Founded INT, Joined INT, Head Coach VARCHAR, Captain VARCHAR)  
SELECT Score FROM itf_singles_finals_18_12-6 WHERE Opponent = natalia rizhonkova